CSS Sprites on Current Page

I want to make a menu using CSS Sprites, however, can’t seem to find information about how to make the current state happen. I have found information on making Sprites work great with WordPress and it’s true, but there is no information as to how to make this happen.

page menu for instance has the class ‘current_page_item’ on the link to the current page, which you can use to style the link in the style.css. others are similar, check the codex for the corresponding links 😉